Reference for Sukkah 62:12

הכא באשרה דמשה עסקינן דכתותי מיכתת שיעוריה

Here [ie. in the Mishnah], we are dealing with a worshipped tree [from the days] of Moses, for [it must be burnt, and therefore it is treated as ashes, and so] its size is crushed [to below the minimum size of a Lulav. The worshipped tree of Rava is a tree worshipped after the days of Moses, which does not need to be burnt].

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